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Piezoresistive effect in spin-coated polyaniline thin films

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Abstract

Polymeric materials have been replacing other materials in various applications, from structural to electronic components. In particular, since the discovery of conducting polymers, the use of these materials is growing up in the manufacture of electronic components, such as organic light-emitting diodes, organic electrodes, energy storage devices and artificial muscles, among others. On the other hand, examples of sensors of conductive polymers based on the piezoresistive effect, with large potential for applications, are not sufficiently investigated. This work reports on the piezoresistive effect of an intrinsically conductive polymer, polyaniline, which was prepared in the form of thin films by spin coating on polyethylene terephthalate substrates. The relationship between electrical response and mechanical solicitations is presented for different preparation conditions. The values of the gauge factor ranges from 10 to 22 for different samples and demonstrates the viability of these materials as piezoresistive sensors.

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Acknowledgements

This work is funded by FEDER funds through the "Programa Operacional Factores de Competitividade – COMPETE" and by national funds by FCT- Fundação para a Ciência e a Tecnologia, project references PTDC/CTM/69316/2006, PTDC/CTM-NAN/112574/2009, and NANO/NMed-SD/0156/2007. J.N.P, A.F. and J. G. R. thank the FCT for Grants SFRH/BD/66930/2009, SFRH/BD/69796/2010 and SFRH/BSAB/1014/2010, respectively. The authors also than the support of the COST Action MP1003, 2010: The ‘European Scientific Network for Artificial Muscles’ (ESNAM).

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Authors and Affiliations

  1. Centre/Department of Physics, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal

    J. Nunes Pereira, P. Vieira, A. Ferreira, A. J. Paleo & S. Lanceros-Méndez

  2. Algoritmi Research Centre, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal

    J. G. Rocha

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  1. J. Nunes Pereira
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  2. P. Vieira
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  3. A. Ferreira
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  4. A. J. Paleo
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  5. J. G. Rocha
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  6. S. Lanceros-Méndez
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Correspondence to J. G. Rocha.

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Pereira, J.N., Vieira, P., Ferreira, A. et al. Piezoresistive effect in spin-coated polyaniline thin films. J Polym Res 19, 9815 (2012). https://doi.org/10.1007/s10965-011-9815-z

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  • DOI: https://doi.org/10.1007/s10965-011-9815-z

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